X-40073147-C-T

Variant names:

• chrX-40073147-C-T
• rs140693978
• NM_001123385.2:c.2199G>A

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS2

The NM_001123385.2(BCOR):​c.2199G>A​(p.Thr733Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000504 in 1,210,250 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 21 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T733T) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000098 (0 hom., 4 hem., cov: 24)
  • Exomes 𝑓: 0.000046 (0 hom. 17 hem.)
• Consequence: BCOR NM_001123385.2 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -4.66
• Publications: 2 publications found

Genes affected

BCOR (HGNC:20893): (BCL6 corepressor) The protein encoded by this gene was identified as an interacting corepressor of BCL6, a POZ/zinc finger transcription repressor that is required for germinal center formation and may influence apoptosis. This protein selectively interacts with the POZ domain of BCL6, but not with eight other POZ proteins. Specific class I and II histone deacetylases (HDACs) have been shown to interact with this protein, which suggests a possible link between the two classes of HDACs. Several transcript variants encoding different isoforms have been found for this gene. A pseudogene of this gene is found on chromosome Y.[provided by RefSeq, Jun 2010]

BCOR Gene-Disease associations (from GenCC):

• microphthalmia, syndromic 2

  Inheritance: XL, Unknown Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, ClinGen, Illumina, Orphanet, Labcorp Genetics (formerly Invitae), G2P
• microphthalmia, Lenz type

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP6: Variant X-40073147-C-T is Benign according to our data. Variant chrX-40073147-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2660314.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High Hemizygotes in GnomAd4 at 4 XL,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BCOR	NM_001123385.2	c.2199G>A	p.Thr733Thr	synonymous_variant	Exon 4 of 15	ENST00000378444.9	NP_001116857.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BCOR	ENST00000378444.9	c.2199G>A	p.Thr733Thr	synonymous_variant	Exon 4 of 15	1	NM_001123385.2	ENSP00000367705.4

Frequencies

GnomAD3 genomes AF: 0.0000981 AC: 11 AN: 112149 Hom.: 0 Cov.: 24

Gnomad AFR AF: 0.000162

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000940

Gnomad OTH AF: 0.000661

GnomAD2 exomes AF: 0.0000164 AC: 3 AN: 183344 AF XY: 0.00

Gnomad AFR exome AF: 0.000152

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000122

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000455 AC: 50 AN: 1098048 Hom.: 0 Cov.: 30 AF XY: 0.0000468 AC XY: 17 AN XY: 363420

African (AFR) AF: 0.0000379 AC: 1 AN: 26398

American (AMR) AF: 0.00 AC: 0 AN: 35205

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19383

East Asian (EAS) AF: 0.00 AC: 0 AN: 30206

South Asian (SAS) AF: 0.00 AC: 0 AN: 54144

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40432

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4133

European-Non Finnish (NFE) AF: 0.0000582 AC: 49 AN: 842055

Other (OTH) AF: 0.00 AC: 0 AN: 46092

GnomAD4 genome AF: 0.0000980 AC: 11 AN: 112202 Hom.: 0 Cov.: 24 AF XY: 0.000116 AC XY: 4 AN XY: 34368

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.000162 AC: 5 AN: 30847

American (AMR) AF: 0.00 AC: 0 AN: 10693

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2651

East Asian (EAS) AF: 0.00 AC: 0 AN: 3572

South Asian (SAS) AF: 0.00 AC: 0 AN: 2673

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6157

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 218

European-Non Finnish (NFE) AF: 0.0000940 AC: 5 AN: 53179

Other (OTH) AF: 0.000653 AC: 1 AN: 1531

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.0000292528), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000604

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Nov 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

BCOR: BP4, BP7, BS2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	1.0
DANN	Benign	0.64
PhyloP100		-4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs140693978; hg19: chrX-39932400; COSMIC: COSV60699379; COSMIC: COSV60699379;